QApplication：No such file or directory 错误解决

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首先打开 Makefile 文件，查看其中 INCPATH 变量的值是否包含程序中所涉及到的头文件路径。

MAKEFILE      = Makefile

####### Compiler, tools and options

CC            = /work/tools/usr/local/arm/4.3.2/bin/arm-linux-gcc -lts -ldl

CXX           = /work/tools/usr/local/arm/4.3.2/bin/arm-linux-g++ -lts -ldl

DEFINES       = -DQT_NO_DEBUG -DQT_WIDGETS_LIB -DQT_GUI_LIB -DQT_CORE_LIB

CFLAGS        = -msoft-float -D__GCC_FLOAT_NOT_NEEDED -march=armv7-a -mtune=cortex-a8 -pipe -O2 -Wall -W -D_REENTRANT -fPIC $(DEFINES)

CXXFLAGS      = -msoft-float -D__GCC_FLOAT_NOT_NEEDED -march=armv7-a -mtune=cortex-a8 -msoft-float -D__GCC_FLOAT_NOT_NEEDED -march=armv7-a -mtune=cortex-a8 -pipe -O2 -Wall -W -D_REENTRANT -fPIC $(DEFINES)

INCPATH       = -I. -I. -I/Qt5/include -I/Qt5/include/QtWidgets -I/Qt5/include/QtGui -I/Qt5/include/QtCore -I. -I/Qt5/mkspecs/linux-arm-gnueabi-g++

QMAKE         = /Qt5/bin/qmake

DEL_FILE      = rm -f

CHK_DIR_EXISTS= test -d

MKDIR         = mkdir -p

COPY          = cp -f

COPY_FILE     = cp -f

COPY_DIR      = cp -f -R

INSTALL_FILE  = install -m 644 -p

INSTALL_PROGRAM = install -m 755 -p

INSTALL_DIR   = cp -f -R

DEL_FILE      = rm -f

SYMLINK       = ln -f -s

DEL_DIR       = rmdir